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• W80450102 abstract "A class of abelian fibered Calabi-Yau threefolds X_{m,n} is shown yield SU(2) structure, in addition to the standard SU(3) holonomy. Compactification of type II string theory on a manifold in this class give a 4D effective supergravity theory in which the topology spontaneously breaks N=4 to N=2 supersymmetry. The breaking occurs at a scale hierarchically lower than the compactification scale when the P^1 base is large compared to the T^4 fiber. We analyze the moduli space of SU(2) structure metrics of the N=4 theory and its restriction to the moduli space of Calabi-Yau metrics of the N=2 theory, showing that the latter agrees with the expectation computed from triple intersection numbers in the classical limit. Finally, we analyze the twisted cohomology ring associated with the SU(2) structure of X_{m,n} and show that the breaking of N=4 to N=2 is conveniently summarized in the lifting cohomology classes as one passes to the standard cohomology ring, with massive modes persisting as torsion classes when the coupling is nonminimal. The analysis is facilitated by the existence of explicit first-order metrics obtained by classical supergravity dualities." @default.
• W80450102 created "2016-06-24" @default.
• W80450102 creator A5048808888 @default.
• W80450102 date "2012-06-18" @default.
• W80450102 modified "2023-09-27" @default.
• W80450102 title "A class of Calabi-Yau threefolds as manifolds of SU(2) structure" @default.
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